Polarized gamma ray investigation of iron disulphide (pyrite)

Mössbauer absorption of Fe⁵⁷, for four equivalent but differently oriented sites, in naturally occuring FeS₂ (pyrite) crystals has been studied in the ideal absorber thickness, as a function of the orientation of the crystal axes with respect to the linearly polarized gamma rays from Co⁵⁷/LiNbO₃ source and the direction of the polarization. E$\text{x}$perimental peak area ratio of ～ 1 in the polycrystalline absorber and the monocrystalline absorbers is independent of the crystal orientation. The analysis of the present experiment shows that the Mössbauer fraction, f, is isotropic and that the asymmetry parameter, η, is zero.